<template>
    <div>
      <!--  面包屑导航  -->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
      </el-breadcrumb>

      <!--  卡片试图区域  -->
      <el-card class="box-card">
      <!--   添加按钮区域     -->
        <el-row>
          <el-col>
            <el-button type="primary" @click="addRolesDialogVisible=true">添加角色</el-button>
          </el-col>
        </el-row>
        <!--   角色列表区域     -->
        <el-table :data="rolesList" border stripe>
          <!--    展开列     -->
          <el-table-column type="expand">
            <template slot-scope="scope">
              <el-row :class="['bdbottom', i1=== 0 ? 'bdtop' : '','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                <!--   渲染一级权限   -->
                <el-col :span="6" >
                  <el-tag closable @close="deleteRight(scope.row,item1.id)">{{item1.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <!--   渲染二级,三级权限   -->
                <el-col :span="18">
                  <el-row :class="[i2===0 ? '' : 'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                    <el-col :span="6">
                      <el-tag type="success" closable @close="deleteRight(scope.row,item2.id)">{{item2.authName}}</el-tag>
                      <i class="el-icon-caret-right"></i>
                    </el-col>
                    <el-col :span="18">
                      <el-tag
                        v-for="(item3) in item2.children"
                        :key="item3.id"
                        type="warning"
                        closable
                        @close="deleteRight(scope.row,item3.id)">
                        {{item3.authName}}
                      </el-tag>
                    </el-col>
                  </el-row>
                </el-col>
              </el-row>
            </template>
          </el-table-column>
          <!--    索引列     -->
          <el-table-column type="index"></el-table-column>
          <el-table-column label="角色名称" prop="roleName"></el-table-column>
          <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
          <el-table-column label="操作">
            <template slot-scope="scope">
              <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
              <el-button size="mini" type="danger" icon="el-icon-delete" @click="deleteRoles(scope.row.id) ">删除</el-button>
              <el-button size="mini" type="warning" icon="el-icon-setting" @click="showRightsList(scope.row)">分配权限</el-button>
            </template>
          </el-table-column>
        </el-table>
      </el-card>

      <!--  添加角色的对话框  -->
      <el-dialog
        title="添加角色"
        :visible.sync="addRolesDialogVisible"
        width="30%"
        @close="addDialogClosed">
        <el-form :model="addForm" :rules="addRules" ref="addFormRef" label-width="auto">
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="addForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述" prop="roleDesc">
            <el-input v-model="addForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
        <el-button @click="addRolesDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addUser">确 定</el-button>
      </span>
      </el-dialog>

      <!--  修改用户的对话框  -->
      <el-dialog
        title="修改角色"
        :visible.sync="editRolesDialogVisible"
        width="30%"
        @close="editDialogClosed"
      >
        <el-form :model="editForm" :rules="editRules" ref="editFormRef" label-width="auto" >
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="editForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述" prop="roleDesc">
            <el-input v-model="editForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
        <el-button @click="editRolesDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUser">确 定</el-button>
      </span>
      </el-dialog>

      <!--  分配权限的对话框  -->
      <el-dialog
        title="分配权限"
        :visible.sync="setRightDialogVisible"
        width="50%"
        @close="setRightDialogClosed"
      >
        <el-tree
          :data="rightsList"
          :props="treeProps"
          show-checkbox
          node-key="id"
          default-expand-all
          :default-checked-keys="defKeys"
          ref="treeRef"
        ></el-tree>
        <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
      </el-dialog>
    </div>
</template>

<script>
export default {
  name: 'Roles',
  data () {
    return {
      rolesList: [],
      addRolesDialogVisible: false,
      editRolesDialogVisible: false,
      setRightDialogVisible: false,
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      addRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          { min: 1, max: 15, message: '角色名称不能超过15个字', trigger: 'blur' }
        ]
      },
      editForm: {},
      editRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          { min: 1, max: 15, message: '角色名称不能超过15个字', trigger: 'blur' }
        ]
      },
      rightsList: [],
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点id数组
      defKeys: [],
      // 被选中的权限id集合(在showRightsList方法中获取)
      roleId: ''
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    // 获取角色列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败!')
      }
      this.rolesList = res.data
      // console.log(this.rolesList)
    },
    // 监听 添加角色 对话框的关闭事件
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    // 监听 修改角色 对话框的关闭事件
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 点击确定按钮,添加新用户
    addUser () {
      // 提交请求前，表单预验证
      this.$refs.addFormRef.validate(async (valid) => {
        // 表单预校验失败
        if (!valid) return
        // 发起添加用户的网络请求
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) {
          this.$message.error('添加用户失败!')
        }
        this.$message.success(res.meta.msg)
        // 隐藏添加角色对话框
        this.addRolesDialogVisible = false
        // 重新获取角色列表
        this.getRolesList()
      })
    },
    // 展示修改用户的对话框
    async showEditDialog (id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        this.$message.error('查询用户信息失败!')
      }
      this.editForm = res.data
      this.editRolesDialogVisible = true
    },
    // 修改角色信息并提交
    editUser () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return false
        // 发起修改角色信息的请求
        const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, {
          roleName: this.editForm.roleName,
          roleDesc: this.editForm.roleDesc
        })
        if (res.meta.status !== 200) {
          this.$message.error('更新角色信息失败')
        }
        // 关闭对话框
        this.editRolesDialogVisible = false
        // 刷新数据列表
        this.getRolesList()
        // 提示修改成功
        this.$message.success('更新角色信息成功')
      })
    },
    // 删除角色
    async deleteRoles (id) {
      const result = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // 点击确定 返回值为：confirm
      // 点击取消 返回值为： cancel
      if (result !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除用户失败')
      }
      this.$message.success('删除用户成功')
      this.getRolesList()
    },
    // 根据id删除角色指定权限
    async deleteRight (role, rightID) {
      const result = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // 点击确定 返回值为：confirm
      // 点击取消 返回值为： cancel
      if (result !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightID}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showRightsList (role) {
      this.roleId = role.id
      // 获取所有权限列表
      const { data: res } = await this.$http.get('rights/tree')
      this.rightsList = res.data
      // console.log(this.rightsList)
      this.getLeafKeys(role, this.defKeys)

      this.setRightDialogVisible = true
    },
    // 通过递归来获取角色下三级权限的id,并保存到defKeys数组中
    getLeafKeys (node, arr) {
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    },
    // 监听 分配权限按钮 的关闭
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 点击 确定 为角色分配权限
    async allotRights () {
      const keys = [...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedKeys()]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('角色分配权限失败!')
      }
      this.$message.success('角色分配权限成功!')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="scss" scoped>
  .el-tag{
    margin: 7px;
  }
  .bdtop{
    border-top: 1px solid #eee;
  }
  .bdbottom{
    border-bottom: 1px solid #eee;
  }
  .vcenter{
    display: flex;
    align-items: center;
  }
</style>
